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Operating Manual
Pro He
OPERATING INSTRUCTIONS FOR
PRO HE
HELIUM ANALYZER
P/N He
Rev 1
DANGER
This instrument is designed to monitor the helium concentrations in a gas mixing
process. When processing gas mixtures intended for breathing, the instrument must
be calibrated and functioning properly. Suffocation or other fatal respiratory
complications can result from improperly calibrated or malfunctioning equipment.
Oxygen accelerates combustion. Do not use this instrument around open flames and
combustible gases, liquids or solids.
Only authorized personnel should conduct maintenance and/or servicing. Before
conducting any maintenance or servicing, consult with authorized
supervisor/manager.
Pro He Manual Rev 08/01/07 P/N He
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Summary of Contents for Nuvair PRO HE
- Page 1 Oxygen accelerates combustion. Do not use this instrument around open flames and combustible gases, liquids or solids. Only authorized personnel should conduct maintenance and/or servicing. Before conducting any maintenance or servicing, consult with authorized supervisor/manager. Pro He Manual Rev 08/01/07 P/N He...
- Page 2 Any safeguards required such as locks, labels, or redundancy, must be provided by the user or specifically requested of Nuvair at the time the order is placed.
- Page 3 The instrument for which this manual was supplied may incorporate one or more options not supplied in the standard instrument. Commonly available options are listed below. CE CONFORMITY: This Nuvair PRO HE Analyzer meets or exceeds all requirements of the Commonwealth of Europe (CE) for Radio Frequency Interference and Electromagnetic Interference (RFI/EMI) protection.
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Page 4: Safety Messages
Pro He Safety Messages Your safety and the safety of others are very important. We have provided many important safety messages in this manual. Please read these messages carefully. A safety message alerts you to potential hazards that could hurt you or others. Each safety message is associated with a safety alert symbol. - Page 5 Manuals do get lost. Additional manuals can be obtained from Nuvair at the address given in the Appendix. Some of our manuals are available in electronic form via the internet. Please visit our...
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Page 6: Table Of Contents
Pro He Table of Contents Safety Messages ................iv Table of Contents ................. vi List of Figures................viii Introduction ................. 11 1.1 Overview 1.2 Features 1.3 Options 1.4 Applications Setup .................... 14 2.1 Unpacking the Analyzer 2.2 Mounting the Analyzer (Wall-Mount Unit) 2.3 AC Power Connections... - Page 7 Pro He Appendix..................24 A.1 Specifications Spare Parts List A.3 Helium/Air Chart A.4 Material Safety Data Sheet Index..................... 31 - vii...
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Page 8: List Of Figures
Pro He List of Figures Figure 1-1: Wall-mountable PRO HE ..........12 Figure 1-2: PRO HE—Portable Configuration ....... 12 Figure 2-1: Mounting Dimensions ..........15 Figure 2-2: Power Adapter Port (Wall Mount) ....... 15 Figure 2-3: Power Adapter Port (Portable Model) ......16 Figure 2-4: Battery Installation ............ - Page 9 Since the use of this instrument is beyond the control of Nuvair, no responsibility by Nuvair, its affiliates, and agents for damage or injury from misuse or neglect of this equipment is implied or assumed.
- Page 10 Pro He BLANK...
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Page 11: Introduction
Figure 1-2. 1.1 Overview The PRO HE analyzes the helium concentrations in a gas mixture. The gas to be monitored is drawn into the analyzer and passed to the sensor network. The sample gas is then directed to a thermal conductivity sensor. This sensor provides a signal that is proportional to the difference in conductivities between the components of the gas mixture. -
Page 12: Figure 1-1: Wall-Mountable Pro He
Pro He Introduction Accuracy is maintained to ± 1% across the entire 0-100% analysis range (He) of the instrument at constant temperature (25°C) at constant pressure (atmospheric). Figure 1-1: Wall-mountable PRO HE Figure 1-2: PRO HE— Portable Configuration - 12... -
Page 13: Features
The PRO HE is specifically offered to the diving industry where specific mixtures of Helium in air are required for technical diving. The PRO HE will allow on-site confirmation of gas mixtures prepared for divers. It is also useful in the gas mixing process during cylinder charging where adjustments to the gas composition can be made based on the real-time analysis of the gas mixture. -
Page 14: Setup
Also covered in this section are battery issues, replacing the battery and replacing micro-fuel cells. 2.1 Unpacking the Analyzer The PRO HE is shipped fully functional and ready to install except for installing and batteries (portable unit only). Carefully unpack the analyzer and inspect it for damage. 2.2 Mounting the Analyzer (Wall-Mount Unit) The PRO HE is designed to mount and operate in a general-purpose area only. -
Page 15: Ac Power Connections
Pro He Setup Mount the instrument so that it does not restrict or cause the sample return line to kink. The sample return port must not be restricted and must be vented at atmospheric pressure. Figure 2-1: Mounting Dimensions 2.4 AC Power Connections Instrument power for the standard wall-mountable model is supplied by a 6VDC power adapter that is plugged into the side of the analyzer as shown in Figure 2-2. -
Page 16: Battery Test (Portable Model Only)
Pro He Setup VDC power adapters, P/N A558 (US) or A555 (CE). When using the adapter, insert the jack into the port on the side of the front panel near the ON/OFF/ BATT TEST switch as shown in Figure 2-3. -
Page 17: Calibration
Pro He Setup To install the batteries, remove the 2 screws securing the battery compartment lid. Lift out the compartment cover and install the batteries noting the polarity indicated on the label molded into the battery holder. See Figure 2-4. - Page 18 Pro He Setup 2. After 2 minutes and with air still flowing in the sample line, adjust the helium zero potentiometer on the front panel until a reading on the helium display reads slightly above zero, for instance, 4% helium.
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Page 19: Figure 2-5: Typical Sample System With Calibration
Pro He Setup Figure 2-5: Typical Sample System with Provisions for Calibration - 19... -
Page 20: Operation
Pro He Operation Operation 3.1 Operation/Start-up Using the PRO HE analyzer basically involves three steps: • Powering up the instrument • Attach a sample gas 3.1.1 Powering Up Turn the instrument on using the power switch and allow it to operate for 30 seconds. -
Page 21: Figure 3-1: Typical Setup Flow Diagram
Pro He Operation Figure 3-1: Typical Setup Flow Diagram Note: The wall-mounted version requires the tubing and a 1/8” NPT male barb fitting. - 21... -
Page 22: Maintenance
Maintenance Maintenance The PRO HE requires very little maintenance, other than calibration, checking and changing the batteries, and cleaning the plastic housing. Routine maintenance consists of periodic cleaning of the front panel and displays and leak checking the gas lines. Should any part of the instrument malfunction or fail to perform, the unit should be removed from service and returned for repair and calibration. -
Page 23: Figure 4-1: Battery Disposition
MIXCHEK Maintenance Figure 4-1: Battery Disposition - 23... -
Page 24: Appendix
Pro He Appendix Appendix A.1 Specifications CE Conformity: This Nuvair PRO HE Analyzer meets or exceeds all requirements of the Commonwealth of Europe (CE) for Radio Frequency Interference and Electromagnetic Interference (RFI/EMI) protection. Gas Concentrations: 1 SLPM nominal 2.5 SLPM maximum (0.5 psig/3.4 kPa max) - Page 25 Pro He Appendix Dimensions: Wall Mount: (6.2 L x 5.9 W x 3.7 D)in (157.5 x 149.9 x 94.0)mm Portable: (8.7 L x 7.5 W x 3.8 D)in (221 x 190.5 x 96.5) mm Storage Temp. 0 to +50°C Operating Temp: 0-40°C Humidity: Environmental, 95% non-condensing max.
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Page 26: Spare Parts List
Pro He Appendix A.2 Spare Parts List PART NO DESCRIPTION C74069-R33D1 Micro-Fuel Cell R33D1 A558 6 VDC 115 VAC 60 Hz power adapter (US version) C-cell alkaline battery A555 6VDC International Power Adapter 100-240 VAC 50/60 Hz (CE version) B75401... -
Page 27: Helium/Air Chart
Typically, it is adequate to check one high helium reading, and one low reading on a PRO HE analyzer (these analyzers use two point calibration). Helium concentrations of 10% and 90% are good targets to shoot for. The actual concentrations are not important. - Page 28 Pro He Appendix Helium & Air Chart Percent Percent Percent Percent Helium Oxygen Helium Oxygen 0.00 10.45 0.21 10.66 0.42 10.87 0.63 11.08 0.84 11.29 1.05 11.50 1.25 11.70 1.46 11.91 1.67 12.12 1.88 12.33 2.09 12.54 2.30 12.75 2.51 12.96...
- Page 29 Pro He Appendix Percent Percent Percent Percent Helium Oxygen Helium Oxygen 5.64 16.09 5.85 16.30 6.06 16.51 6.27 16.72 6.48 16.93 6.69 17.14 6.90 17.35 7.11 17.56 7.32 17.77 7.52 17.97 7.73 18.18 7.94 18.39 8.15 18.60 8.36 18.81 8.57 19.02...
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Page 30: Material Safety Data Sheet
Pro He Appendix A.4 Material Safety Data Sheet Consult Nuvair for a copy of the MSDS sheet for this product or visit our website at www.nuvair.com. - 30... -
Page 31: Index
Pro He Index Index accuracy, 12 manuals, additional, v address, 26 microprocessor, 11, 13 analysis range, 29 Pro He, 12 applications, 13 Pro He-portable, 12 BATT TEST, 16 model information, iii batteries, 16 mounting dimensions, 15 lifetime, 24 MSDS, 30... - Page 32 2949 West 5 Street Oxnard, CA 93030 Ph. 1-805-815-4044 Fax 1-108-815-4196 www.nuvair.com Revision 08-01-2007...
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